Modeling and Experiment of Pulse Electrochemical Deburring on Inclined Exit Surface of Drilling Hole

2011 ◽  
Vol 328-330 ◽  
pp. 502-506 ◽  
Author(s):  
Ning Ma ◽  
Wen Ji Xu ◽  
Ze Fei Wei ◽  
Gui Bing Pang
Keyword(s):  
Mathematical Model ◽  
Influencing Factors ◽  
Applied Voltage ◽  
Voltage Pulse ◽  
Burr Height ◽  
Exit Surface ◽  
Interelectrode Gap ◽  
Parametric Studies ◽  
The Mathematical Model ◽  
Applied Voltage Pulse

In this paper the characteristics of pulse electrochemical deburring (PECD) is analyzed through a developed mathematical model and main influencing factors such as applied voltage, pulse duty factor, deburring time, initial burr height and initial interelectrode gap on burr height have been analyzed. The paper also highlights the scheme of the developed PECD system designed to operate within the parametric limits. The calculated results obtained from the mathematical model are found to be approximately consistent with the experimental results. The results show that initial burr height h0=0.057mm is removed, and the fillet radius R=0.248mm is obtained. The present paper through various parametric studies will act as a guideline for the operation of a PECD system.

Mathematical Modeling of Electrochemical Deburring

2010 ◽  
Vol 126-128 ◽  
pp. 545-550 ◽  
Author(s):  
Wen Ji Xu ◽  
W. Wang ◽  
Xu Yue Wang ◽  
Gui Bing Pang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Influencing Factors ◽  
Applied Voltage ◽  
Experimental Results ◽  
Electrode Gap ◽  
Workpiece Material ◽  
Burr Height ◽  
Object A ◽  
The Mathematical Model

The drilling burr is taken as the research object. A mathematical model of electrochemical deburring (ECD) is established and the effects of main influencing factors, such as inter-electrode gap, applied voltage and deburring time, on burr height have been analyzed. The results show that the deburring time increases with the increase of initial burr height, inter-electrode gap, with the decrease of volume of electrochemical equivalent of the workpiece material, conductivity of electrolyte and applied voltage. The deburring time for various burr heights can be predicted by the mathematical model. The calculated results obtained from the mathematical model are approximately consistent with the experimental results. The results show that initial burr height h0=0.722mm is removed, and the fillet radius R=0.211mm is obtained.

scholarly journals Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Elmar Slikboer ◽  
James Walsh
Keyword(s):  
Electron Density ◽  
Applied Voltage ◽  
Voltage Pulse ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Thomson Scattering ◽  
Electron Dynamics ◽  
Electron Density And Temperature ◽  
Argon Plasma Jet ◽  
Applied Voltage Pulse

AbstractThe interaction between an argon plasma jet excited using microsecond duration voltage pulses and a liquid target was examined using Thomson scattering to quantify the temporal evolution of the electron density and temperature. The electrical resistance between a liquid target and the electrical ground was varied from 1 to $$680\, \text {k}\Omega $$ 680 k Ω to mimic different conductivity liquids while the influence of the varying electrical properties on the electron dynamics within the plasma were examined. It was demonstrated that the interaction between the plasma jet and a liquid target grounded via a high resistance resulted in typical dielectric barrier discharge behaviour, with two discharge events per applied voltage pulse. Under such conditions, the electron density and temperature reached a peak of $$1\cdot 10^{15}\, \text {cm}^{-3}$$ 1 · 10 15 cm - 3 and 3.4 eV, respectively; with both rapidly decaying over several hundreds of nanoseconds. For liquid targets grounded via a low resistance, the jet behaviour transitioned to a DC-like discharge, with a single breakdown event being observed and sustained throughout the duration of each applied voltage pulse. Under such conditions, electron densities of $$2{-}3 \cdot 10^{15}\, \text {cm}^{-3}$$ 2 - 3 · 10 15 cm - 3 were detected for several microseconds. The results demonstrate that the electron dynamics in a pulsed argon plasma jet are extremely sensitive to the electrical characteristics of the target, which in the case of water, can evolve during exposure to the plasma.

Effects of tuning the applied voltage pulse periods on the electroluminescence spectra of host–guest white light-emitting electrochemical cells

2018 ◽  
Vol 20 (27) ◽  
pp. 18226-18232 ◽  
Author(s):  
Ming-Lun Wu ◽  
Guan-Yu Chen ◽  
Ting-An Shih ◽  
Chin-Wei Lu ◽  
Hai-Ching Su
Keyword(s):  
White Light ◽  
Applied Voltage ◽  
Voltage Pulse ◽  
Color Temperature ◽  
Electrochemical Cells ◽  
Pulse Period ◽  
Light Emitting ◽  
Applied Voltage Pulse

Tunable correlated color temperature of electroluminescence from white light-emitting electrochemical cells based on adjusting the voltage pulse period.

Influencing Factors Analysis on Regulating Effect of the Pintle Controlled Thrust Regulating Mechanism

2010 ◽  
Vol 44-47 ◽  
pp. 1320-1324
Author(s):  
Lan Ting Zhang ◽  
Hai Qing Cheng ◽  
Li Ming Song ◽  
Jin Shun Yan
Keyword(s):  
Mathematical Model ◽  
Influencing Factors ◽  
Theoretical Foundation ◽  
Rocket Engine ◽  
Structure Design ◽  
Factors Analysis ◽  
Main Factors ◽  
Solid Rocket ◽  
And Control ◽  
The Mathematical Model

Based on the thrust regulating principle of pintle controlled solid-rocket engine, the mathematical model between pintle motion and thrust changing is established, and influence of main factors to thrust regulating effect is analyzed. These results can provide theoretical foundation for structure design and control of pintle controlled thrust regulating mechanism of solid-rocket engine.

Life Prediction of Bearings Based on Fuzzy Theory

2010 ◽  
Vol 455 ◽  
pp. 422-426 ◽  
Author(s):  
X.Q. Wang ◽  
F.K. Cui ◽  
G.B. Wang
Keyword(s):  
Mathematical Model ◽  
Case Studies ◽  
Influencing Factors ◽  
Life Prediction ◽  
Fuzzy Theory ◽  
Membership Degree ◽  
Fuzzy Reliability ◽  
Calculation Results ◽  
The Mathematical Model ◽  
Full Consideration

Based on the fuzzy theory and universal calculation equations, the mathematical model is established for predicting life of a bearing by analyzing various factors. And the fuzzy reliability life can be calculated according to the model. The case studies show that for the proposed method takes full consideration of all the influencing factors and their function of membership degree, the calculation results are very close to the actual ones.

Lung-Diaphragm Behavior of the Respiratory System During Input From Excitation

2002 ◽  
Author(s):  
P. Ruby Mawasha ◽  
Paul Lam ◽  
Lalitha Kasturi
Keyword(s):  
Mathematical Model ◽  
Respiratory System ◽  
Periodic Motion ◽  
Constitutive Relations ◽  
Air Flow ◽  
Flow Conditions ◽  
Mouth Pressure ◽  
Parametric Studies ◽  
The Mathematical Model ◽  
Operating Regimes

A numerical behavior of a lung-diaphragm model of a respiratory system during input from mouth pressure and diaphragm excitation is being investigated. A lung-diaphragm is subject to constant inlet air-flow conditions into the respiratory system. The mouth pressure (Macia et. al., 1997) and diaphragm excitation (Ricci et. al., 2002) are described by a constitutive relations containing nonlinearities from rib cage muscles forces and inlet air-flow conditions. Within certain operating regimes, the model exhibits self-excited pulsatile periodic motion and the qualitative features of the response can be understood in terms of the underlying model. Further, the mathematical model is a more general approach and can be used to conduct parametric studies and determine the instability mechanisms involved in the modeling of lung-diaphragm behavior of the respiratory system during input from excitation.

scholarly journals Mathematical model for assessing the high-rise apartment buildings complex quality

2019 ◽  
Vol 91 ◽  
pp. 02025 ◽  
Author(s):  
Azariy Lapidus ◽  
Yana Shesterikova
Keyword(s):  
Mathematical Model ◽  
Influencing Factors ◽  
Quality Index ◽  
Construction Project ◽  
Factor Matrix ◽  
High Rise ◽  
Apartment Buildings ◽  
The Mathematical Model

With use of factor matrix, four groups of parameters were identified, and one group was determined as the most significant one, which affects the complex quality index in high-rise apartment buildings constriction. The dependence between the complex quality index and the values of influencing factors was determined. The mathematical model that allows making adjustments to achieve the required levels of quality at all stages of the construction project was considered.

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